Presto

Presto Notebooks are Generally Available

PRES-1996: Presto Notebooks are generally available, with these changes:

  • QDS has implemented a native Presto Interpreter; this shows progress as a percentage in the Notebook UI.

  • Concurrency is supported. You can specify maximum concurrency using zeppelin.presto.maxConcurrency when you create the interpreter; the default is 10.

Presto 0.208 is Supported

PRES-2169: The latest supported version is Presto 0.208, which supports file-based authentication, FastPath, and Dynamic Filtering. Beta Cluster Restart Required

Enhancements

  • PRES-2087: Qubole now allows you to gracefully decommission problematic worker nodes (if any) during autoscaling in a Presto cluster. For more information, see Decommissioning a Worker Node.

RubiX is Supported (Beta)

RubiX caching provides faster read performance for recently accessed files. This is a Beta feature, disabled by default. Enable it from the Clusters page of the QDS UI.

Enhancements

  • PRES-2087: Qubole now allows you to gracefully decommission problematic worker nodes (if any) during autoscaling in a Presto cluster. For more information, see Decommissioning a Worker Node.

Bug Fixes

  • PRES-2026: Makes planning-time improvements to speed up plan generation for queries that have complex predicates or operate on tables with many partitions.

  • PRES-2150: Resolves an issue that caused queries using memory counters to fail intermittently with the error Future should be done.

  • PRES-2168: Fixes a Dynamic Filtering bug related to concurrency.

  • PRES-2232: Resolves a problem that caused failures in queries using the system.jdbc schema with PacketTooBigException, when there were too many tables in one of the Hive schemas.

  • PRES-2276: Fixes a problem that caused multiple output files to be created even when the output was sorted.

  • PRES-2287: Fixes a problem that caused DESC commands to fail with Access denied when a custom SystemAccessControl package was used.